#!/usr/bin/node

var pi=Math.PI;

module.exports=function(r){
  function circumference(){
    return pi*2*r;
          
  }
  function area(){
    return pi*r*r;
          
  }
  function diemetre(){
    return 2*r;
  }
  return {
    area:area,
    circumference:circumference,
    diemetre:diemetre    
  };

};
console.log(module);
